Poroelastic relaxation indentation of thin layers of gels

Yuhang Hu, Edwin P. Chan, Joost J. Vlassak, Zhigang Suo

Research output: Contribution to journalArticlepeer-review


We develop a method of poroelastic relaxation indentation (PRI) to characterize thin layers of gels. The solution to the time-dependent boundary-value problem is obtained in a remarkably simple form, so that the force-relaxation curve obtained by indenting a gel readily determines all the poroelastic constants of the gel-the shear modulus, Poisson's ratio, and the effective diffusivity. The method is demonstrated with a layer of polydimethylsiloxane immersed in heptane.

Original languageEnglish (US)
Article number086103
JournalJournal of Applied Physics
Issue number8
StatePublished - Oct 15 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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